Liquid purification or separation – Processes – Preventing – decreasing – or delaying precipitation,...
Patent
1984-01-17
1984-09-18
Therkorn, Ernest G.
Liquid purification or separation
Processes
Preventing, decreasing, or delaying precipitation,...
210755, 210764, 210765, 252181, C02F 512
Patent
active
044722834
ABSTRACT:
The disclosure teaches a method of retarding the loss of carbon dioxide from a circulating water system by means of quaternary ammonium compounds having at least one hydrocarbon radical containing twelve or more carbon atoms or at least two hydrocarbon radicals each containing seven or more carbon atoms. In the method an effective amount of a suitable quaternary ammonium compound is added to the water in the system, surprisingly slowing the rate of loss of carbon dioxide from the water. Carbon dioxide is added to the water as needed to maintain the desired pH. The method provides an advantageous alternative to using stronger and more hazardous acids in maintaining a lowered pH in circulating water systems, for example, in heat exchange systems that utilize cooling towers.
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patent: 2713077 (1955-07-01), Rieve
patent: 2801151 (1957-07-01), Nelson
patent: 3579445 (1971-05-01), Tate
patent: 3658463 (1972-04-01), Billings
Betz Handbook of Industrial Water Conditioning, Seventh Edition, pp. 194-195 and 202-206.
The Merck Index, Eighth Edition, 1968, p. 226.
Amber-Hi-Lites, Rohm and Haas, Jul. 1974, No. 141.
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